Flavoring with geranyl butyl ether

ABSTRACT

Described are processes and compositions for augmenting or enhancing the flavor and/or aroma of foodstuffs, chewing gums, medicinal products and toothpastes using as the essential ingredient geranyl butyl ether.

This application is a divisional of application for U.S. Letters Patent, Ser. No. 012,798, filed on Feb. 16, 1979, which, in turn, is a divisional of application for U.S. Letters Patent, Ser. No. 939,897, filed on Sept. 5, 1978, now U.S. Pat. No. 4,163,068, issued July 31, 1979, which, in turn, is a divisional of application for U.S. Letters Patent, Ser. No. 872,937, filed on Jan. 27, 1978, now U.S. Pat. No. 4,131,687, issued on Dec. 26, 1978.

BACKGROUND OF THE INVENTION

The instant invention provides novel C₁₀ -terpenyl ethers having the structure:

    (C.sub.10 -TERPENYL--O--R.sub.1).sub.n

wherein the terpene moiety has one of the structures: ##STR1## and the moiety R₁ is C₁ -C₄ alkyl, C₃ or C₄ alkenyl, C₃ haloalkenyl or C₃ alkynyl, and uses thereof for their organoleptic properties in consumable materials.

Materials which can provide green citrus, limey, lemony, piney, tart, herbaceous, floral, sweet anise, borneol-like, earthy carrot, petitgrain-like, grapefruit, deep woody, animal, sandal-like woody, fruity, floral, camphoraceous, and rosemary-like notes with basil-like, carvone-like, chamomile-like, and vanillin-like nuances and sweaty undertones are known in the art of perfumery. Many of the natural materials which provide such fragrances and contribute desired nuances to perfumery compositions are high in cost, vary in quality from one batch to another and/or are generally subject to the usual variations of natural products. By the same token materials which can provide sweet, fruity, berry-like, minty, green, herbal, musty, vegetable (especially celery), spicey, earthy, anise-like, aniseed, fresh fennel, strawberry-like, citrus peel-like (especially orange peel), citrus, coriander-like, licorice, floral, rosey, woody, parsely, grapefruit-like, cumin-like, eucalyptol-like, cedarwood-like, oakwood-like, lemon juice-like, camphoraceous, blueberry, sassafrass, and rooty aroma notes with nutty, fruity, berry-like, minty, bitter, musty, waxy, green, herbal, woody, vegetable (especially celery-like), earthy, sweet, spicey, anise-like, aniseed, fresh fennel, strawberry, citrus peel (especially orange peel), citrus-like, floral, rosey, woody, parsley grapefruit-like, cumin-like, coriander-like, eucalyptol-like, green pea, lemon juice-like, cedarwood like and steamed oak flavor notes having sour effects, astringent effects, mouthfeel effects and biting effects are well known in the art of flavoring for foodstuffs, toothpastes, chewing gums and medicinal products. Many of the natural materials which provide such flavor notes and contribute desired nuances to flavorant compositions are high in cost, vary in quality from one batch to another and/or are generally subject to the usual variations of natural products.

There is, accordingly, a continuing effort to find synthetic materials which will replace enhance or augment the essential flavor and fragrance notes provided by natural essential oils or compositions thereof. Unfortunately many of these synthetic materials either have the desired nuances only to a relatively small degree or else contribute undesirable or unwanted odor to the compositions. The search for materials which can provide a more refined licorice-like flavor, for example, has been difficult and relatively costly in the areas of both natural products and synthetic products.

Artificial flavoring agents for foodstuffs have received increasing attention in recent years. For many years such food flavoring agents have been preferred over natural flavoring agents at least in part due to their diminished cost and their reproducible flavor qualities. For example, natural food flavoring agents such as extracts, concentrates and the like are often subject to wide variations due to changes in quality, type and treatment of the raw materials. Such variations can be reflected in the end products and result in unfavorable flavor characteristics in said end product. Additionally, the presence of the natural product in the ultimate food may be undesirable because of increased tendency to spoil. This is particularly troublesome in food and food uses where such products as dips, soups, chips, sausages, gravies and the like are apt to be stored prior to use.

The fundamental problem in creating artificial flavor agents is that the artificial flavor to be achieved be as natural as possible. This generally proves to be a difficult task since the mechanism for flavor development in many foods, medicinal products, chewing gums and toothpastes is not completely known. This is noticable in products having licorice, citrusy and vegetable flavor characteristics particularly.

Even more desirable are products that can serve to substitute for difficult-to-obtain natural perfumery oils and at the same time substitute for natural flavoring ingredients in foodstuffs, chewing gums, medicinal products and toothpastes.

In U.S. Pat. No. 3,993,604 issued on Nov. 23, 1976, Thomas and Ohloff disclose a process for improving, enhancing, or modifying the organoleptic properties of perfumes, perfumed products, natural or artificial essential oils which comprises adding thereto a small but effective amount of at least one compound of the formula: ##STR2## wherein R₄ is hydrogen, alkyl or acyl containing from one up to six carbon atoms and the dashed line represents a carbon-carbon single bond or a carbon-carbon double bond. The compounds of U.S. Pat. No. 3,993,604 are, however, different in kind insofar as their organoleptic qualities and aroma and flavor intensities are concerned from the C₁₀ -terpenyl ethers of the instant case.

A number of the methyl ethers of C₁₀ -terpenes are known, for example, the methyl ether of Carveol (Beilstein, Vol. VI, syst. No. 510) and 1,8-dimethoxy-p-menthane

(Royals, J. Am. Chem. Soc., 71, 2563-71 (1949)). In addition, the methyl ether of p-cymen-8-ol is known as an oxygenated constituent of the essential oil of black pepper as disclosed in Bull.Soc.Chim. Belg. 1975, 84(3), 167-77 (abstracted in Chem Abstracts 83:25073c). The ethyl ether of p,α-dimethylphenethyl alcohol is disclosed at Chem Abstracts 70:57320d.

Burczyk at Chem Abstracts 74:13285z discloses a number of methyl ethers of C₁₀ -terpenes having the following structures: ##STR3##

However, the usefulness for augmenting or enhancing the organoleptic properties of perfumes, perfumed articles, colognes, foodstuffs, chewing gums, toothpastes or medicinal products of the terpene ethers as disclosed herein is neither expressly nor implicitly set forth in any of the references set forth above.

Arctander, "Perfume and Flavor Chemicals (Aroma Chemicals)" 1969, discloses at No. 696 the organoleptic properties of citronellyl vinyl ether as follows: ##STR4## "Colorless liquid. Insoluble in water, soluble in alcohol and oils. Green-foliage-like, Rose-Geranium type, fresh and rather powerful odor of modest tenacity.

Useful in Citrus cologne types, soap perfumes (as a diffusive and refreshing topnote ingredient), as a supporting item for Geranium notes, etc."

At No. 1961 (Vol. II) of Arctander, methyl citronellyl ether is disclosed for its organoleptic properties as follows: ##STR5## "Colorless liquid.

Insoluble in water, soluble in alcohol and oils.

Fresh-rosy, green-leafy type of odor with a "wet vegetable" note of attractive naturalness. Moderate to poor tenacity.

This ether has been suggested for use in perfume compositions, but it is rarely offered commercially, although many ethers of Citronellol, Geraniol, Linalool and related alcohols have been prepared in search of new floral-green materials. Quite a large number of these ethers have very interesting and attractive odors, and it is rather surprising that very few are offered commercially.

The title ether could find use in modern fragrances, particularly as part of novel topnote complexes with Citrus, Galbanum or fresh-herbaceous materials, fruity notes, etc.

It blends very well with Bergamot, Estragon, Basil, Verbena and other distinguished topnote materials, and it is tolerated in the perfume composition at quite surprising concentrations. In other words, its pleasant level of application has a very considerable "range" from less than one percent up to 10 or 15%, in exceptional cases even higher than that."

However, nothing in the Arctander references discloses the unexpected, unobvious and advantageous organoleptic properties of the C₁₀ -terpenyl ethers of the instant invention.

THE INVENTION

It has now been determined that certain C₁₀ -terpenyl ethers are capable of imparting a variety of flavors and fragrances to various consumable materials and are also capable of augmenting or enhancing a variety of flavors and fragrances of various consumable materials. Briefly our invention contemplates augmenting or enhancing the flavors and/or fragrances of such consumable materials as perfumes, perfumed articles, colognes, foodstuffs, chewing gums, toothpastes and medicinal products by adding thereto a small but effective amount of at least one C₁₀ -terpenyl ether having the structure:

    (C.sub.10 -TERPENYL--O--R.sub.1).sub.n

wherein n is 1 or 2 and wherein the terpene moiety has one of the structures: ##STR6## wherein R₁ is C₁ -C₄ alkyl, C₃ or C₄ alkenyl, C₃ haloalkenyl, or C₃ alkynyl.

The C₁₀ -terpenyl ethers of our invention augment or enhance sweet, fruity, berry-like, minty, green, herbal, musty, vegetable (especially celery), spicey, earthy, anise-like, aniseed, fresh fennel, strawberry-like, citrus peel-like (especially orange peel), citrus, coriander-like, licorice, floral, rosey, woody, parsely, grapefruit-like, cumin-like, eucalyptol-like, cedarwood-like, oakwood-like, lemon juice-like, camphoraceous, blueberry, sassafrass, and rooty aroma characteristics and nutty, fruity, berry-like, minty, bitter, musty, waxy, green, herbal, woody, vegetable (especially celery-like), earthy, sweet, spicey, anise-like, aniseed, fresh fennel, strawberry, citrus peel (especially orange peel), citrus-like, floral, rosey, woody, parsley, grapefruit-like, cumin-like, coriander-like, eucalyptol-like, green pea-like, lemon juice-like with sour and astringent mouthfeel and biting effects insofar as augmenting or enhancing the aroma or taste of foodstuffs, toothpastes, medicinal products and chewing gums. The C₁₀ -terpinyl ethers of our invention also augment or enhance the green citrus, limey, lemony, piney, tart, herbaceous, floral, sweet anise, borneol-like, earth carrot, petitgrain-like, grapefruit, deep woody animal, sandal-like woody, fruity, floral, camphoraceous, and rosemary/lavander-like notes of perfumes, perfumed articles and colognes and augment, enhance or impart basil-like, carvone-like, chamomile-like, and/or vanillin-like nuances with sweaty undertones.

Examples of the C₁₀ -terpenyl ethers of our invention and their organoleptic characteristics are as follows:

                                      TABLE I                                      __________________________________________________________________________     STRUCTURE OF                                                                   COMPOUND    NAME OF COMPOUND                                                                             FLAVOR CHARACTERISTICS                                                                          FRAGRANCE CHARACTERISTICS           __________________________________________________________________________      ##STR7##   Geranyl butyl ether                                                                          Citrus floral, rosey aroma characteristics with                                citrus, nutty, floral, rosey and bitter flavor                                 character- istics                                                                               A green citrus, lemony, floral                                                 aroma                                ##STR8##   Carvyl ethyl ether                                                                           A woody, green, parsley- like, celery-like and                                 grapefruit-like aroma characteristic with                                      woody, green, green pea-like, celery- like,                                    citrus flavor charac- teristics and a sour and                                 astringent effect                                                                               An earthy, carrot topnote                                                      giving way to a petitgrain                                                     character with basil/ carvone                                                  nuances                              ##STR9##   8-p-cymenyl-ethyl ether                                                                      An herbal, cumarin-like and green aroma                                        characteristic with herbal, cumin-like, lemon                                  juice-like, green, and oily flavor character-                                  istics            A sweet, phenolic, cymene-like                                                , acetophenone- like aroma                                                     with a musty, vanilla,                                                         anthranilate note                    ##STR10##  fenchyl ethyl ether                                                                          A woody, cedarwood-like, oakwood-like, lemon                                   juice-like, camphoraceous, herbaceous, citrus-li                               ke, blueberry-like, sassafrass and rooty aroma                                 characteristic with woody, cedarwood-like,                                     steamed oak, camphoraceous, herbaceous,                                        citrusy, woody, blueberry, sassafrass-like and                                 rooty flavor characteristics and a sour,                                       mouthfeel and astringent effect.                                                                 A sweet, camphor- aceous,                                                     minty, herbaceous, woody,                                                      green aroma with                                                               a eucalyptus-like undertone.         ##STR11##  bornyl methyl ether            Camphoraceous, herbal,                                                         rosemary/lavendar                                                              and borneol-like aroma               ##STR12##  carvyl methyl ether                                                                          A carrot, parsley-like, earthy and herbal aroma                                character- istic with sweet, carrot-like,                                      earthy, celery-like, herbal, parsley-like                                      flavor character- istics and a biting                                                           A fresh, earthy, carrot                                                        topnote giving way to a woody,                                                 carvone-like  caraway, basil                                                   note                                 ##STR13##  bornyl ethyl ether                                                                           A camphoraceous, woody, cedarwood-like,                                        eucalyptol-like, and blueberry-like aroma                                      characteristic with camphora- ceous, woody,                                    eucalyptol-like, blueberry flavor                                              characteristics and an astringent                                                                A grape- fruit topnote which                                                  fades quickly to sour and                                                      acrid having ultimately a                                                      sour, fruity, floral aroma                                                     with chamomile nuances.              ##STR14##  3-allyloxy-2(10)- pinene                                                                     A sweet, anise-like, green, woody and floral                                   aroma characteristic with an anise, green and                                  woody flavor characteristic                                                                     A strong, sweet, anise                                                         borneol-like note with piney                                                   and herbaceous nuances               ##STR15##  2-(2-propynyloxy)- 2(10)-pinene                                                              Aniseed, phenyl, coriander, fruity, berry and                                  citrus peel aroma and flavor characteristics                                                    A sweet, floral aroma with a                                                   vanillin sweetness and a                                                       borneol, sweaty undertone            ##STR16##  3(2-chloroallyloxy)- 2(10)-pinene                                                            Sweet, aniseed-like, fresh phenyl, fruity,                                     strawberry, orange peel and citrusy aroma and                                  flavor characteristics                                                                          A fatty, creosote-like                                                         citrusy, linalyl acetophenone-                                                 ike aroma with musty phenolic                                                  notes                                ##STR17##  3-(methallyloxy)- 2(10)-pinene                                                               A citrus, licorice and spicey aroma                                            characteristic with bitter flavor                                              characteristics  A fruity, anise- lemony aroma                                                  with a woody nuance                  ##STR18##  α-terpinyl methyl ether                                                                A sweet, vegetable celery- like), spicey aroma                                 character- istic with an earthy nuance and a                                   woody, celery-like, earthy flavor                                              characteristic with sweet and spicey                                                            A tart, limey, terpineol- like                                                 note                                 ##STR19##  1,8-dimethoxy-p- menthane                                                                    A sweet, fruity and minty aroma characteristic                                 with green and musty nuances and a nutty,                                      fruity and minty flavor characteristic with                                    bitter, musty, waxy and green                                                                   A citrusy note modified by a                                                   sweet, sandal-like-woody note        ##STR20##  1,8-diethoxy-p- menthane                                                                     Woody aroma character and woody and bitter                                     flavor characteristics                                                                          A green, citrus/lemony, woody                                                  aroma.                              __________________________________________________________________________

The 1,8-dimethoxy-p-menthane can exist as a mixture of the cis and trans isomers thereof or can be used as the "cis" isomer having the structure: ##STR21## or the "trans" isomer having the structure: ##STR22##

The C₁₀ -terpenyl ethers of our invention can be produced using any one of several known techniques. Thus, the terpenyl alcohol can be reacted with a lower alkanol in the presence of an acid catalyst such as paratoluenesulfonic acid at reflux conditions. As a further example, 8-p-cymenol may be reacted with an excess of ethanol (e.g. from 2 up to 10-fold excess) in the presence of p-toluenesulfonic acid, and the reaction mass may then be refluxed for a period of from 2 up to 10 hours. By the same token carvyl ethyl ether may be produced by reacting ethanol with carveol, the ratio of ethanol:carveol being about 1 mole ethanol:0.1 moles carveol, and the reaction may take place in the presence of p-toluenesulfonic acid.

The ethers so useful in our invention may also be formed by reacting the corresponding terpenic alcohol with the appropriate sulfate in the presence of sodium hydride in anhydrous media and in the presence of an inert solvent such as dimethyl formamide. Thus, for example, fenchyl alcohol is reacted with diethyl sulfate, the fenchyl alcohol and diethyl sulfate being in a molar proportion of about 1:1 in the presence of sodium hydride and dimethyl formamide.

Compounds having the generic structure: ##STR23## wherein R₂ represents C₃ or C₄ alkenyl, C₃ haloalkenyl or C₃ alkynyl, may be prepared by reacting pinocarveol with the appropriate organic halide. This reaction is carried out under the influence of a base comprising the step of placing the reactants for the process and the base, respectively, in two immiscible phases; an organic phase and either (i) an aqueous base phase or (ii) a solid base phase with the reactants being located substantially entirely in the first mentioned organic phase and the base being located substantially entirely in the second mentioned phase; and adding to the two phase system a "phase transfer agent" which may be one or more of several organic quaternary ammonium salts.

Specific examples of "phase transfer agents" useful in our invention are as follows:

Tricapryl methyl ammonium chloride;

Cetyl trimethyl ammonium bromide; and

Benzyl trimethyl ammonium hydroxide.

In general, the "phase transfer agents" most preferred have the generic formula: ##STR24## wherein at least one of R₁ ', R₂ ', R₃ ' and R₄ ' is C₆ -C₁₄ aryl, C₆ -C₁₀ aralkyl, C₆ -C₂₀ alkyl, C₆ -C₁₄ aralkyl and C₆ -C₂₀ alkenyl, and the other of R₂ ', R₃ ' and R₄ ' is alkyl such as methyl, ethyl, n-propyl, i-propyl, 1-butyl, 2-butyl, 1-methyl-2-propyl, 1-pentyl and 1-octyl and Z- is an anion such as chloride, bromide and hydroxide.

This process of our invention is carried out in an inexpensive solvent which is inert to the reaction system, such as toluene, benzene, o-xylene, m-xylene, p-xylene, ethyl benzene, n-hexane, cyclohexane, methylene dichloride and o-dichlorobenzene.

The process of our invention is carried out at a temperature in the range of from about 10° C. up to about 150° C. with a temperature range of 30°-120° C. being preferred. The reaction time is inversely proportional to the reaction temperature, with lower reaction temperature giving rise to greater reaction times; and, accordingly, the reaction time ranges from about 30 minutes up to about 10 hours.

In the reaction of our invention the mole ratio of pinocarveol to organic halide is in the range of from 0.5:1.5 up to about 1.5:0.5 with a preferred ratio of pinocarveol to organic halide being from about 1:1 up to about 1:1.2.

The mole ratio of base to pinocarveol in the reaction mass may be in the range of from about 0.75:1 up to about 1.5:1 with a preferred ratio of base:pinocarveol being from about 1:1 up to about 1.2:1.

The quantity of "phase transfer agent" in the reaction mass based on the amount of pinocarveol in the reaction mass may vary from 0.5 grams per mole of pinocarveol up to 25 grams of "phase transfer agent" per mole of pinocarveol with a preferred concentration of "phase transfer agent" being in the range of from about 2.5 up to about 7.5 grams of "phase transfer agent" per mole of pinocarveol.

This reaction of our invention is preferably carried out at atmospheric pressure since that is the most convenient condition. However, lower or higher pressures can be used without detrimentally affecting the ultimate yield of desired product. The particular base used in the reaction is not critical, but, preferred are sodium hydroxide and potassium hydroxide.

The individual C₁₀ -terpenyl ethers of our invention can be obtained in pure form or in substantially pure form by conventional purification techniques. Thus, the products can be purified and/or isolated by distillation, extraction, crystallization, preparative chromatographic techniques and the like. It has been found desirable to purify the C₁₀ -terpenyl ethers by fractional distillation in vacuo.

When the C₁₀ -terpene ethers of our invention are used as food flavor adjuvants, the nature of the co-ingredients included with said C₁₀ -terpene ethers in formulating the product composition will also serve to alter, modify, augment or enhance the organoleptic characteristics of the ultimate foodstuff treated therewith.

As used herein in regard to flavors, the terms "alter," "modify" and "augment" in their various forms mean "supplying or imparting flavor character or note to otherwise bland, relatively tasteless substances or augmenting the existing flavor characteristic where a natural flavor is deficient in some regard or supplementing the existing flavor impression to modify its quality, character or taste."

The term "enhance" is used herein to mean the intensification of a flavor or aroma characteristic or note without the modification of the quality thereof. Thus, "enhancement" of a flavor or aroma means that the enhancement agent does not add any additional flavor note.

As used herein, the term "foodstuff" includes both solid and liquid ingestible materials which usually do, but need not, have nutritional value. Thus, foodstuffs include soups, convenience foods, beverages, dairy products, candies, vegetables, cereals, soft drinks, snacks and the like.

As used herein, the term "medicinal product" includes both solids and liquids which are ingestible, non-toxic materials which have medicinal value such as cough syrups, cough drops, aspirin and chewable medicinal tablets.

The term "chewing gum" is intended to mean a composition which comprises a substantially water insoluble, chewable plastic gum base such as chicle, or substitutes therefor, including jelutong, guttakay, rubber or certain comestible natural or synthetic resins or waxes. Incorporated with the gum base in admixture therewith may be plasticizers or softening agents, e.g., glycerine, and a flavoring composition which incorporates one or more of the C₁₀ -terpene ethers of our invention, and in addition, sweetening agents which may be sugars, including sucrose or dextrose and/or artificial sweeteners such as cyclamates or saccharin. Other optional ingredients may also be present.

Substances suitable for use herein as co-ingredients or flavoring adjuvants are well known in the art for such use, being extensively described in the relevant literature. It is a requirement that any such material be "ingestibly" acceptable and thus non-toxic and otherwise non-deleterious particularly from an organoleptic standpoint whereby the ultimate flavor and/or aroma of the consumable material used is not caused to have unacceptable aroma and taste nuances. Such materials may in general be characterized as flavoring adjuvants or vehicles comprising, broadly, stabilizers, thickeners, surface active agents, conditioners, other flavorants and flavor intensifiers.

Stabilizer compounds include preservatives, e.g., sodium chloride; antioxidants, e.g., calcium and sodium ascorbate, ascoribic acid, butylated hydroxyanisole (mixture of 2- and 3-tertiary-butyl-4-hydroxy-anisole), butylated hydroxytoluene (2,6-di-tertiary-butyl-4-methyl phenol), propyl gallate and the like, and sequestrants, e.g., citric acid.

Thickener compounds include carriers, binders, protective colloids, suspending agents, emulsifiers and the like, e.g., agar agar, carrageenan; cellulose and cellulose derivatives such as carboxymethyl cellulose and methyl cellulose; natural and synthetic gums such as gum arabic, gum tragacanth; gelatin, proteinaceous materials; lipids, carbohydrates; starches, pectins, and emulsifiers, e.g., mono- and diglycerides of fatty acids, skim milk powder, hexoses, pentoses, disaccharides, e.g, sucrose corn syrup and the like.

Surface active agents include emulsifying agents, e.g., fatty acids such as capric acid, capyrlic acid, palmitic acid, myristic acid and the like, mono- and diglycerides of fatty acids, lecithin, defoaming and flavor-dispersing agents such as sorbitan monostearate, potassium stearate, hydrogenated tallow alcohol and the like.

Conditioners include compounds such as bleaching and maturing agents, e.g., benzoyl peroxide, calcium peroxide, hydrogen peroxide and the like; starch modifiers such as peracetic acid, sodium chlorite, sodium hypochlorite, propylene oxide, succinic anhydride and the like, butters and neutralizing agents, e.g., sodium acetate, ammonium bicarbonate, ammonium phosphate, citric acid, lactic acid, vinegar and the like; colorants, e.g., carminic acid, cochineal, tumeric and curcuma and the like; firming agents such as aluminum sodium sulfate, calcium chloride and calcium gluconate; texturizers, anti-caking agents, e.g., aluminum calcium sulfate and tribasic calcium phosphate; enzymes; yeast foods, e.g., calcium lactate and calcium sulfate; nutrient supplements, e.g., iron salts such as ferric phosphate, ferrous gluconate and the like, riboflavin, vitamins, zinc sources such as zinc chloride, zinc sulfate and the like.

Other flavorants and flavor intensifiers include organic acids, e.g., acetic acid, formic acid, 2-hexenoic acid, benzoic acid, n-butyric acid, caproic acid, caprylic acid, cinnamic acid, isobutyric acid, isovaleric acid, alpha-methyl-butyric acid, propionic acid, valeric acid, 2-methyl-2-penetenoic acid, and 2-methyl-3-pentenoic acid; ketones and aldehydes, e.g., acetaldehyde, acetophenone, acetone, acetyl methyl carbinol, acrolein, n-butanal, crotonal, diacetyl, 2-methylbutanal, beta,beta-dimethylacrolein, methyl n-amyl ketone, n-hexanal, 2-hexenal, isopentanal, hydrocinnamic aldehyde, cis-3-hexenal, 2-heptenal, nonyl aldehyde, 4-(p-hydroxyphenyl)-2-butanone, alpha-ionone, beta-ionone, 2-methyl-3-butanone, benzaldehyde, damascone, α-damascone, damascenone, acetophenone, 2-heptanone, o-hydroxyacetophenone, 2-methyl-2-hepten-6-one, 2-octanone, 2-undecanone, 3-phenyl-4-pentenal, 2-phenyl-2-hexenal, 2-phenyl-2-pentenal, furfural, 5-methylfurfural, cinnamaldehyde, beta-cyclohomocitral, 2-pentanone, 2-pentenal and propanal; alcohols such as 1-butanol, benzyl alcohol, 1-borneol, trans-2-buten-1-ol, ethanol, geraniol, 1-hexanol, 2-heptanol, trans-2-hexenol-1, cis-3-hexen-1-ol, 3-methyl-3-buten-1-ol, 1-pentanol, 1-penten-3-ol, p-hydroxyphenyl-2-ethanol, isoamyl alcohol, isofenchyl alcohol, phenyl-2-ethanol, alpha-terpineol, cis-terpin hydrate, eugenol, linalool, 2-heptanol, acetoin; esters, such as butyl acetate, ethyl acetate, ethyl acetoacetate, ethyl benzoate, ethyl butyrate, ethyl caprate, ethyl caproate, ethyl carpylate, ethyl cinnamate, ethyl crotonate, ethyl formate, ethyl isobutyrate, ethyl isovalerate, ethyl laurate, ethyl myristate, ethyl alphamethylbutyrate, ethyl propionate, ethyl salicylate, trans-2-hexenyl acetate, hexyl acetate, 2-hexenyl butyrate, hexyl butyrate, isoamyl acetate, isopropyl butyrate, methyl acetate, methyl butyrate, methyl caproate, methyl isobutyrate, alpha-methylphenylglycidate, ethyl succinate, isobutyl cinnamate, cinnamyl formate, methyl cinnamate and terpenyl acetate; hydrocarbons such as dimethyl naphthalene, dodecane, methyldiphenyl, methyl naphthalene, myrcene, naphthalene, octadecane, tetradecane, tetramethylnaphthalene, tridecane, trimethylnaphthalene, undecane, caryophyllene, α-phellandrene, β-phellandrene, p-cymene 1-alpha-pinene, beta-pinene, dihydrocarveol; pyrazines such as 2,3-dimethyl-pyrazine, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 3-ethyl-2,5-dimethylpyrazine, 2-ethyl-3,5,6-trimethylpyrazine, 3-isoamyl-2,5-dimethylpyrazine, 5-isoamyl-2,3-dimethylpyrazine, 2-isoamyl-3,5,6-trimethylpyrazine, isopropyl dimethylpyrazine, methyl ethylpyrazine, tetramethylpyrazine, trimethylpyrazine; essential oils such as jasmine absolute, cassia oil, cinnamon bark oil, black pepper oleoresin, oil of black pepper, rose absolute, orris absolute, oil of cubeb, oil of coriander, oil of pimento leaf, oil of patchouli, oil of nutmeg, lemon essential oil, safran oil, Bulgarian rose, capsicum, yara yara and vanilla; lactones such as γ-nonalactone; sulfides, e.g., methyl sulfide and other materials such as maltol, and acetals (e.g., 1,1-diethoxyethane, 1,1-dimethoxyethane and dimethoxymethane), piperine, chavicine, and piperidine.

The specific flavoring adjuvant selected for use may be either solid or liquid depending upon the desired physical form of the ultimate product, i.e., foodstuff, whether simulated or natural, and should, in any event, (i) be organoleptically compatible with the C₁₀ -terpene ethers of our invention by not covering or spoiling the organoleptic properties (aroma and/or taste) thereof; (ii) be non-reactive with the C₁₀ -terpene ethers of our invention and (iii) be capable of providing an environment in which the C₁₀ -terpene ethers can be dispersed or admixed to provide a homogeneous medium. In addition, selection of one or more flavoring adjuvants, as well as the quantities thereof will depend upon the precise organoleptic character desired in the finished product. Thus, in the case of flavoring compositions, ingredient selection will vary in accordance with the foodstuff, chewing gum, medicinal product or toothpaste to which the flavor and/or aroma are to be imparted, modified, altered or enhanced. In contradistinction, in the preparation of solid products, e.g., simulated foodstuffs, ingredients capable of providing normally solid compositions should be selected such as various cellulose derivatives.

As will be appreciated by those skilled in the art, the amount of C₁₀ -terpene, alkyl, alkenyl, haloalkenyl, and alkynyl ethers and diethers employed in a particular instance can vary over a relatively wide range, depending upon the desired organoleptic effects to be achieved. Thus, correspondingly, greater amounts would be necessary in those instances wherein the ultimate food composition to be flavored (e.g. with a spice flavor or a specific black pepper-like flavor) is relatively bland to the taste, whereas relatively minor quantities may suffice for purposes of enhancing the composition merely deficient in natural flavor or aroma. The primary requirement is that the amount selected be effective, i.e., sufficient to alter, modify or enhance the organoleptic characteristics of the parent composition, whether foodstuff per se, chewing gum per se, medicinal product per se, toothpaste per se, or flavoring composition.

The use of insufficient quantities of C₁₀ -terpene alkyl, alkenyl, haloalkenyl, and alkynyl ethers and diethers will, of course, substantially vitiate any possibility of obtaining the desired results while excess quantities prove needlessly costly and in extreme cases may disrupt the flavor-aroma balance, thus proving self-defeating. Accordingly, the terminology "effective amount" and "sufficient amount" is to be accorded a significance in the context of the present invention consistent with the obtention of desired flavoring effects.

Thus, and with respect to ultimate food compositions, chewing gum compositions, medicinal product compositions and toothpaste compositions, it is found that quantities of C₁₀ -terpene alkyl, alkenyl, haloalkenyl, and alkynyl ethers and diethers ranging from a small but effective amount, e.g., 0.5 parts per million up to about 100 parts per million based on total composition, are suitable. Concentrations in excess of the maximum quantity stated are not normally recommended since they fail to provide commensurate enhancement of organoleptic properties. In those instances wherein the C₁₀ -terpene alkyl, alkenyl, haloalkenyl, and alkynyl ethers and diethers are added to the foodstuff as an integral component of a flavoring composition, it is of course essential that the total quantity of flavoring composition employed be sufficient to yield an effective C₁₀ -terpene alkyl, alkenyl, haloalkenyl, and alkynyl ether and diether concentration in the foodstuff product.

Food flavoring compositions prepared in accordance with the present invention preferably contain the C₁₀ -terpene alkyl, alkenyl, haloalkenyl, and alkynyl ethers and diethers in concentrations ranging from about 0.1% up to about 15% by weight based on the total weight of the said flavoring composition.

The composition described herein can be prepared according to conventional techniques well known as typified by cake batters and fruit drinks and can be formulated by merely admixing the involved ingredients within the proportions stated in a suitable blender to obtain the desired consistency, homogeneity of dispersion, etc. Alternatively, flavoring compositions in the form of particulate solids can be conveniently prepared by mixing the C₁₀ -terpene alkyl, alkenyl, haloalkenyl, and alkynyl ethers and diethers with, for example, gum arabic, gum tragacanth, carrageenan and the like, and thereafter spray-drying the resultant mixture whereby to obtain the particular solid product. Pre-prepared flavor mixes in powder form, e.g., a fruit-flavored powder mix, are obtained by mixing the dried solid components, e.g., starch, sugar and the like, and C₁₀ -terpene alkyl, alkenyl, haloalkenyl, and alkynyl ethers and diethers in a dry blender until the requisite degree of uniformity is achieved.

It is presently preferred to combine with the C₁₀ -terpene alkyl, alkenyl, haloalkenyl, and alkynyl ethers and diethers of our invention, the following adjuvants:

Oil of Cubeb;

Phellandrene;

β-phellandrene;

Oil of Coriander;

Oil of Pimento Leaf;

Oil of Patchouli;

Alpha Pinene;

Beta Pinene;

Beta-caryophyllene;

Dihydrocarveol;

Piperonal;

Piperine;

Chavicine;

Piperidine;

Oil of Black Pepper;

Black Pepper Oleoresin;

Capsicum;

Oil of Nutmeg.

Cardamom Oil;

Clove Oil;

Spearmint Oil; and

Oil of Peppermint.

The C₁₀ -terpene alkyl, alkenyl, haloalkenyl, and alkynyl ethers and diethers of our invention can be used to contribute, green citrus, limey, lemony, piney, tart, herbaceous, floral, sweet anise, borneol-like, earthy carrot, petigrain, grapefruit, deep woody animal, sandal-like woody, fruity, floral, camphoraceous, and rosemary/lavender-like notes with basil-like, carvone-like, chamomile-like, vanillin-like nuances and sweaty undertones. As olfactory agents the C₁₀ -terpene alkyl, alkenyl, haloalkenyl, and alkynyl ethers and diethers of our invention can be formulated into or used as components of a "perfume composition."

The term "perfume composition" is used herein to mean a mixture of organic compounds including, for example, alcohols, aldehydes, ketones, nitriles, ethers, and frequently hydrocarbons which are admixed so that the combined odors of the individual components produce a pleasant or desired fragrance. Such perfume compositions usually contain: (a) the main note of the "bouquet" or foundation-stone of the composition; (b) modifiers which round-off and accompany the main note; (c) fixatives which include odorous substances which lend a particular note to the perfume throughout all stages of evaporation, and substances which retard evaporation; and (c) top-notes which are usually low-boiling, fresh-smelling materials.

In perfume compositions the individual component will contribute its particular olfactory characteristics, but the overall effect of the perfume composition will be the sum of the effect of each ingredient. Thus, the individual compounds of this invention, or mixtures thereof, can be used to alter the aroma characteristics of a perfume composition, for example, by highlighting or moderating the olfactory reaction contributed by another ingredient in the composition.

The amount of the C₁₀ -terpene alkyl, alkenyl, haloalkenyl, and alkynyl ether and diether of this invention which will be effective in perfume compositions depends on many factors, including the other ingredients, their amounts and the effects which are desired. It has been found that perfume compositions containing as little as 2% of the C₁₀ -terpene alkyl, alkenyl, haloalkenyl, and alkynyl ethers and diethers of this invention, or even less, can be used to impart an interesting citrusy and/or petitgrain aroma to soaps, cosmetics, and the other products. The amount employed can range up to 50% or higher and will depend on considerations of cost, nature of the end product, and the effect desired on the finished product and particular fragrance sought.

The C₁₀ -terpene alkyl, alkenyl, haloalkenyl, and alkynyl ethers and diethers of this invention can be used alone or in a perfume composition as a olfactory component in detergents and soaps, space odorants and deodorants; perfumes; colognes, toilet waters; bath salts; hair preparations such as lacquers, brilliantines, pomades, and shampoos; cosmetic preparations such as creams, deodorants, hand lotions, and sun screens; powders such as talcs, dusting powders, face powder, and the like. When used as an olfactory component of a perfumed article, as little as 0.01% of one or more of the C₁₀ -terpene alkyl, alkenyl, haloalkenyl, and alkynyl ethers and diethers will suffice to impart an interesting citrusy and/or petitgrain aroma. Generally, no more than 0.5% is required.

In addition, the perfume composition can contain a vehicle or carrier for the C₁₀ -terpene alkyl, alkenyl, haloalkenyl, and alkynyl ethers and diethers alone or with other ingredients. The vehicle can be a liquid such as an alcohol such as ethanol, a glycol such as propylene glycol, or the like. The carrier can be an absorbent solid such as a gum or components for encapsulating the composition.

The following examples are given to illustrate embodiments of the invention as it is presently preferred to practice it. It will be understood that these examples are illustrative, and the invention is not to be considered as restricted thereto except as indicated in the appended claims.

EXAMPLE SYNTHESIS OF GERANYL BUTYL ETHER

Reaction:

    ______________________________________                                          ##STR25##                                                                      ##STR26##                                                                     Chemicals                                                                      ______________________________________                                         Geraniol         77 g = 0.5M                                                   Sodium hydroxide 70 g (50% aqueous), 0.5M                                      Butyl Iodide     110 g, 0.6M                                                   Toluene          100 ml                                                        Aliquat 336® 2.5 g                                                         ______________________________________                                    

Procedure

The Geraniol, toluene and Aliquat 336® (tricapryl methyl ammonium chloride produced by the General Mills Chemicals, Inc.) are admixed in a one liter flask equipped with a condenser, thermometer, mechanical stirrer, addition funnel and heating mantle. The NaOH is added dropwise over a 10-15 minute period. The reaction mass is heated to 40° C., and butyl iodide is added dropwise over a 30-40 minute period while maintaining the temperature at 40°-50° C. The reaction mass is then stirred at room temperature for 1 hour. The mixture is then heated to reflux, and GC indicates the formation of two peaks.

The title compound is purified by trapping from an 8'×1/8" 20% SE-30 GLC column.

Crude Material Yield: 83.45 g

GC Yield: 21.48% 

What is claimed is:
 1. A process for imparting citrus, floral and rosey aroma characteristics and citrus, nutty, floral, rosey and bitter flavor characteristics to a foodstuff or chewing gum comprising the step of adding to said material from 0.5 ppm up to about 100 ppm or geranyl butyl ether. 